فَمَا ٱسْطَـٰعُوٓا۟ أَن يَظْهَرُوهُ وَمَا ٱسْتَطَـٰعُوا۟ لَهُۥ نَقْبًا
Famas taa'ooo any yazharoohu wa mastataa'oo lahoo naqbaa
So they could not scale it, nor could they breach it.
Read all of Surah Al-Kahf
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